Sam Tan Chin Siong (Chinese: 陈振泉; pinyin: Chén Zhènquán, born (1958-10-13)13 October 1958) is a Singaporean former politician.

Tan attended Tuan Mong High School and Hwa Chong Junior College before graduating from the National University of Singapore in 1983 with a Bachelor of Arts with honours degree.

Tan started his career at the People's Association (PA), where he served as Deputy Executive Director between 1992 and 1997.

Tan made his political debut in the 2006 general election contesting in Tanjong Pagar GRC and won by an uncontested walkover.

[6] During the 2011 general election, Tan contested in the newly created Radin Mas SMC.